20. Find the minimum value of ry+xz+ yz given that r, y, z are real numbers that satisfies the equation r +y² + z² = 1.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 17EQ
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I need answers for items no. 20 and 21.

20. Find the minimum value of ry +xz+yz given that r, y, z are real numbers that satisfies
the equation r? + y² + 2² = 1.
21. How many ways are there to put 7 identical oranges into 4 identical packages so that
each package has at least one apple?
Transcribed Image Text:20. Find the minimum value of ry +xz+yz given that r, y, z are real numbers that satisfies the equation r? + y² + 2² = 1. 21. How many ways are there to put 7 identical oranges into 4 identical packages so that each package has at least one apple?
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